/Engine/Plugins/Runtime/StateTree/Source/StateTreeModule/Public/StateTreeTypes.h
Time duration with random variance. Stored compactly as two uint16s, which gives time range of about 650 seconds. The variance is symmetric (+-) around the specified duration.
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)() struct FStateTreeRandomTimeDuration
uint16
Duration
uint16
RandomVariance